To do that, requires a more powerful search engine than what is currently there. Simply put, the current search can only give you a max of 100 results at a time. It's not designed to parse a database that's 6.5GB and growing, and in all honesty can only handle MAYBE 300MB of database data. That's spread across several subdomains.
We do have the search engine for the big db we have, but have not ported it in, nor will be in this version. It is code version dependent, which means it's not going to work so well with the software currently in place.